Its average depth is about 3,688 meters (12,100 ft), and its maximum depth is 10,994 meters (6.831 mi) at the Mariana Trench. Nearly half of the world's marine waters are over 3,000 meters (9,800 ft) deep. The vast expanses of deep ocean (anything below 200 meters or 660 feet) cover about 66% of Earth's surface.
hyperventilation. 1. increase of air in the lungs above the normal amount. 2. abnormally prolonged and deep breathing, usually associated with acute anxiety or emotional tension. A transient, respiratory alkalosis commonly results from hyperventilation. More prolonged hyperventilation may be caused by disorders of the central nervous system, or by drugs.
Hyperventilation probably isnât what you think it is. Hyperventilation is when ventilation exceeds metabolic demands and PaCO2 drops below 5 kPa. The result will be an alkalosis that affects the function of every protein in the body, producing a confusing spectrum of symptoms with a single cause. Shallow, rapid breathing is probably just that, not necessarily hyperventilation.